The person tied to the wall was indeed the surviving assassin who had previously tried to snatch the Ge Dan. Gu Qingheng had originally sent people to interrogate him, but when Yang Ruxin said she wanted to try out the good stuff the old man had researched, he stopped and let the man rest for a day.
And lying unconscious on the ground was Tian Geng, captured by Shadow One.
Yang Ruxin, carried into the cave by Gu Qingheng, immediately expressed her admiration, "You guys really know how to pick a spot."
"This was discovered by Gu Yao the last time we were searching for Daya," Gu Qingheng said with a smile, "It's quite hidden, very convenient for stashing away people or things."